Synchronization Signal Repeat Pattern for Subcarrier Spacing Detection
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Solution Overview
Problem
In 5G wireless communication systems, terminals face challenges in efficiently detecting subcarrier spacings during initial access, which hinders efficient initial access and resource allocation for various services, especially in scenarios with multiple subcarrier spacings and dynamic uplink/downlink changes in TDD and FDD systems.
Innovation Solution
A method where a base station generates and transmits a synchronization signal based on the subcarrier spacing, allowing terminals to detect the subcarrier spacing through a repeat pattern in the time domain, enabling efficient initial access and dynamic resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple subcarrier spacings are supported in one 5G system, then various services with different transmission requirements can be provided, but terminals cannot efficiently detect the subcarrier spacing during initial access
Solution Approach 1:
The patent applies the principle of using different time-domain repeat patterns as indicators to signal different subcarrier spacings. Specifically, synchronization signals with different subcarrier spacings exhibit distinct repeat patterns in the time domain, allowing terminals to detect the subcarrier spacing by analyzing these patterns without requiring complex signaling overhead.
2Ease of operation
If subcarrier spacing is not detected during initial access, then initial access process cannot be performed, but detecting subcarrier spacing increases access time and complexity
Solution Approach 1:
The patent enables the synchronization signal itself to carry subcarrier spacing information through its inherent time-domain repeat pattern. Terminals can autonomously detect the subcarrier spacing by analyzing the repeat pattern of received synchronization signals without requiring additional signaling from the base station, thereby reducing access time and complexity while maintaining ease of operation.
3Adaptability or versatility
If dynamic uplink/downlink changes are implemented in TDD systems, then resource allocation flexibility is improved, but delay time management becomes more complex
Solution Approach 1:
The patent enables terminals to detect subcarrier spacing and achieve synchronization before data transmission begins. By detecting the repeat pattern of synchronization signals during initial access, terminals are prepared in advance with the correct subcarrier spacing information, allowing them to efficiently handle dynamic uplink/downlink changes and meet delay time requirements for various services.
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (loT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention is a method by which a base station transmits a signal in a wireless communication system for efficiently performing an initial access procedure of a terminal, the method comprising the steps of: generating the synchronization signal on a basis of subcarrier spacing used in the synchronization signal; and transmitting the synchronization signal to the terminal.